lambert



(No Model.) 2 Sheets--Sheet 1. E. LfG. LAMBERT. DEVELOPING TRAY.

Patgted Dec. Z9, 189.6.

2 Sheets-Sheet 2,

(N0 Model.)

' E L- C. LAMBERT,

` DEVELOPING TRAY.

No. 573.888. Patented Deo. 29, 1896.

y1 Y mmm n cover of the basin.

UNITED f STATES PATENT OFFICE.

EMILE LEON CONSTANT LAMBERT, OF BOULOGNE, FRANCE.

DEVELOPING-TRAY.

SPECIFICATION forming part of Letters Patent N o.. 573,888, dated December 29, 1896.

Application filed NOVmlJel 4,1895. Serial No. 567,913. (No model.)

To all whom t may con/cern:

Be it known that I, EMILE LEON CONSTANT LAMBERT, of the city of Boulogne-sur-Mer, (Pas-de-Calais,) France, have invented Improvements in Dishes for Photographic Purposes, of which the following is a full, clear, and exact description.

This invention relates to improvements in invertible photographic dishes or baths, permitting of the development or other treatment of photographic plates without the possibility of any ot' the liquid escaping from the dish or bath, even if the latter be turned on end or on its side for watching the appearance of the image upon the plate,or even upside down, and also permitting development Without fear of soiling the hands bythe developing liquid and without having to touch the plate until after the developing` operation is completed.

In order to secure a thorough understanding of the invention, I have represented in the accompanying` drawings as a specimen only the device which permits of realizing my invention. l

In the drawings, Figure l represents a vertical section on the line l 2 of Fig. 2 of a photographic dish, bath, or basin constructed in conformity with my invention. Fig. 2' is a plan view thereof. Fig. 3 is a vertical section of the edges of the'dish, bath, or basin forming a cover. Fig. 4. is a vertical section of the base or bottom frame of the basin. Fig. 5 is a vertical section made on the line 3 et of Fig.v 2, showing the arrangement serving to withdraw the glass plate from the basin. Fig. 6 shows in elevation the device for closing the oriice of the channel for discharging the liquid contained in the bath. Fig. 7 is a plan View thereof corresponding to Fig. G. Figs. 8, 9, and 10 show in vertical sections some modifications of the edges forming the Figs. 1l and l2 illustrate in elevation and plan view, respectively, a Inodiiication of the device serving to release the glass plate or the photographic plate from the dish, bath, or basin.

In the dierent figures similar referenceforming the transparent bottom of the dish or bath. This glass plate, upon which the photographic plate c rests, is provided with a recess d, in which is located a hook ve on the end of a rod f, mounted in guides g, iixed upon the interior wall of the turned-over edges h, tori'ning` the cover of the bath or dish. These turned-over edges h, of aluminium, enameled sheet metal, Celluloid, gutta-percha, or any other suitable material, may be of various shapes, for example, such as represented in Fig. 3 or that represented in Fig. S, and may be iixed upon the base ct of the bath in any suitable manner, so as to insure a watertight joint in the bath. The said base may sometimes be made integral with the curved edges of the dish or bath, as shown in Figs. 9 and l0, and the glass plate b may be without a recess d. In this case the aforesaid hook e is located in a hollow g', provided in one of the walls of the dish, and the rod carrying the hook is held in place by a small claw n, fixed in any suitable manner on the dish or bath, as shown in Figs. 1l and 12.

The base d is provided with a channel for emptying the liquid, the exterior orifice of which channel is closed by a stopper or washer 7c, o't india-rubber, held in place bythe action of a spring l, pivoted upon the dish or bath by means of a screw m.

Fig. 6 shows in full lines the position of the stopper closing the discharge-opening for the liquid contained in the bath and in dotted lines this same stopper during the discharge of the liquid. The channel for emptying the liquid Inay of course be arranged at any suitable place, for example, at the upper part of the edges of the basin, and Inay be closed by a screw-stopper.

From the preceding it is evident that the liquid contained in the dish cannot be spilled outside the same Whatever the position of the dish may be, as the liquid will always flow into the chamber or recess formed by the turnedover edges of the dish h even when the dish is turned upside down. The photographic plate c,resting upon the glass base b of the dish, will be maintained in contact with the same by air-pressure, and therefore the dish maybe placed vertically in order to watch, by transmitted light, the development of the image without having to withdraw the photographic plate from the dish and without fear olA spilling; the developing liquid. After the developing` operation is finished the photographic plate is removed from the basin, for example,

by means of the hooked rodf aforesaid, by I d rawing` the same upward, (the plate to be rel. A photographie tray eomprisingabottom and upwardly-extending sides, said sides havg ing' returned portions in substantially the same vertical plane with the margins of l'he bottom plate whereby a free opening` is lel'l` Within the sides for the placing and removal. of the photographie plate, substantially as described.

A photographie plate emnprising a boltoni plate, a rim about and beyond the edge of the same, said rim havin g a returned llange 7i in substantially the same vertical plane Awith the margin of the bottom with a reservoir be yond said margin and extending around the same, the space Within the returned edge being; lree `jor the insertion or removal o1 the photographie pl ate, substz'iniially as de scribed.

rlhe foregoingspeeilieation ol my improvements in dishes for photographie purposes signed by me this )ist day oi Oetobm', l S95.

Witnesses CLYDE Simorsinnn, ALBERI? MURRAY. 

